TechnologyBack to black: The enduring quest to portray nothing A painting of a black square shown in Russia 100 years ago broke new ground, now revisited by an exhibition in London and a carbon nanotube take on the original CultureLab
LifeTalking gibbonish: Deciphering the banter of the apes New ways to decode animal chatter reveal a lot about what they are saying. And the answers could unravel human language too Features